.net core 2.1 "POST" an IFormFile using Postman - the application completed without reading the entire request body

Question

I'm working on a dotnet core WebAPI 2.1 and I can't find a way of sending to into the Body an image.

The controller looks like this:

    [HttpPost("api/image")]
    public IActionResult Post([FromBody]IFormFile file)
    {
        var filePath = Path.GetTempFileName();
        if (file.Length > 0)
        {
            return Ok();
        }
        return BadRequest();
    }

And this is my Postman call:

This call is never finishing as the Kestrel is failing

I've already tried to use Consumes

[Consumes("application/json", "application/json-patch+json", "multipart/from-data")]

Also in postman, I have set Content-Type to multipart/form-data

Answer 1

I found the solution for .Net Core 2.1/2.2 here

POST multiple files from POSTMAN

POST single file from POSTMAN

    [HttpPost]
    public async Task<IActionResult> UploadSingleFile([FromForm(Name = "file")] IFormFile file)
    {
        if (!ModelState.IsValid)
            return BadRequest(ModelState);
        var IDsList = new IDsList();

        try
        {
            var id = SaveFile(file);
            IDsList.Files.Add(new IDsList.FileInfo() { id = id, fileName = file.FileName });
        }
        catch (Exception ex)
        {
            return BadRequest(ex.Message);
        }

        return Content(JsonConvert.SerializeObject(IDsList), "application/json");
    }

    [HttpPost("UploadFiles")]
    public async Task<IActionResult> UploadFiles([FromForm(Name = "files")] ICollection<IFormFile> files)
    {
        if (!ModelState.IsValid)
            return BadRequest(ModelState);

        //var files = Request.Form.Files?.GetFiles("files");
        String message = String.Empty;
        int filesCounter = 0;
        var IDsList = new IDsList();

        foreach (var file in files)
        {
            if (file.Length == 0)
                message = message + $"errorDescription {file.FileName}\n";

            try
            {
                var id = SaveFile(file);
                IDsList.Files.Add(new IDsList.FileInfo() { id = id, fileName = file.FileName });
                filesCounter++;
            }
            catch(Exception ex)
            {
                message = $"{message}{ex.Message}\n";
            }
        }

        IDsList.message = $"Amount: {filesCounter}.\n{message}";

        return Content(JsonConvert.SerializeObject(IDsList), "application/json");
    }

Answer 2

Seems like there is an error problem with Postman macOS application. When I'm using the postman chrome extension everything works as expected.

MacOS app

Chrome extension